software-properties-gtk crashed with aptdaemon.errors.AptDaemonError in _convert_dbus_exception(): org.debian.apt: Could not cancel transaction

[Rafał]

Crash during updating cache after changes in sources.list

Lubuntu 15.04

ProblemType: Crash
DistroRelease: Ubuntu 15.04
Package: software-properties-gtk 0.96.4
ProcVersionSignature: Ubuntu 3.13.0-43.72-generic 3.13.11.11
Uname: Linux 3.13.0-43-generic x86_64
ApportVersion: 2.17-0ubuntu1
Architecture: amd64
CrashCounter: 1
CurrentDesktop: LXDE
Date: Mon Apr 6 14:07:57 2015
ExecutablePath: /usr/bin/software-properties-gtk
InstallationDate: Installed on 2015-01-09 (87 days ago)
InstallationMedia: Lubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2)
InterpreterPath: /usr/bin/python3.4
PackageArchitecture: all
ProcCmdline: /usr/bin/python3 /usr/bin/software-properties-gtk
PythonArgs: ['/usr/bin/software-properties-gtk']
SourcePackage: software-properties
Title: software-properties-gtk crashed with aptdaemon.errors.AptDaemonError in _convert_dbus_exception(): org.debian.apt: Could not cancel transaction
UpgradeStatus: Upgraded to vivid on 2015-02-23 (41 days ago)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.